Bolt

A technology for bolts and nuts, applied in the direction of screws, threaded fasteners, connecting components, etc., which can solve the problems of seizure, jamming, and bolt deviation from the thread pitch, etc., to prevent seizure, strengthen the effect, and prevent jamming Effect

Inactive Publication Date: 2008-06-25
AOYAMA SEISAKUSHO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the bolt may deviate from the thread pitch when screwed into the female threaded member, which may also cause seizure and jamming.

Method used

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Embodiment Construction

[0029] The first embodiment of the bolt of the present invention will be described below with reference to the accompanying drawings. First, the structure of the bolt is introduced in conjunction with accompanying drawings 1 and 2. FIG. 1 shows a simplified thread formed on a bolt 1 . As shown in Figures 1 and 2, the bolt 1 consists of a substantially hexagonal cylindrical head 10 and a substantially cylindrical shank 15 extending along a common axis. The proximal side of the shaft portion 15 is formed with a cylindrical fixed-diameter portion 115 having a constant diameter, and thread ridges 30 are formed at a predetermined pitch on the outer peripheral surface of the fixed-diameter portion 115 . The thread ridge 30 forms a right-handed thread structure that allows the bolt to be threaded into a female threaded member when the bolt is turned in a right-handed direction (clockwise). The distal end side of the rod portion 15 is formed into a cylindrical shape having a diamete...

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Abstract

A bolt, wherein a small diameter guide (116) is formed at the terminal tip part of a shaft part (15) and threads (31) oppositely threaded to threads (30) formed in a fixed diameter part (115) are formed in the guide part. When the bolt (1) is inserted into a nut (100) in a tilted state and the threads (31) are engaged with the female screw part (105) of the nut (100), an effect to raise the bolt (1) occurs in the nut and, therefore, unless the bolt is positioned in a correct tightening attitude, it cannot be threaded into the nut (10). Accordingly, the bolt (1) can be securely prevented from being caught or seized into the nut (100). When the threads (31) are formed in an oppositely threaded double threaded screw, the effect can be further increased.

Description

technical field [0001] The present invention relates to bolts, and more particularly to bolts formed to prevent the bolt itself from being seized or jammed into a female threaded member. Background technique [0002] Conventionally, there have been so-called anti-seizure bolts that, when the bolt is obliquely inserted into the female thread member of the nut, guide its own posture appropriately with a guide portion formed on its bolt shank without any jamming. Make the bolt screw smoothly into the female threaded member. Although ordinary bolts have a shank with a substantially constant diameter, such anti-seize bolts are equipped with a small-diameter or tapered pilot at the front end of the shank so that when the pilot is aligned with the female thread member When the outer peripheral surfaces of the threaded holes are in contact, the posture of the bolt can be appropriately guided. For example, Patent Document 1 discloses a bolt in which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B35/00
CPCF16B35/047
Inventor 村瀬义浩大泽哲也小泽满长谷川祯辰
Owner AOYAMA SEISAKUSHO CO LTD
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